I understand your issue but you may know that Generators are part of the JavaScript spec and is not specific to Adonis.

It's like asking to understand how a foreach loop works in PHP into the Laravel repository when you are coming from Ruby. It's not the goal of Adonis to teach how JavaScript works. You have a lot of tutorials and a very good JavaScript Guide from the MDN.

I can say that Adonis will have a better documentation for the next release (4.0) with more examples and it will be more "user oriented" but it will probably not explain how JavaScript works.